Bis-azotriazinyl reactive dyes having an n-alkyl-phenylenediamine link

Abstract

A water-soluble reactive dye of the formula: <IMAGE> wherein D represents a radical of a water-soluble azo dye selected from: (i) sulphonated monoazo radicals which are free from complexly bound metal and have the formula: <IMAGE> wherein A represents a radical of the benzene or naphthalene series, R3 represents hydrogen or C1-8-alkyl and one of U and V is SO3H, the other being H, and (ii) a disazo radical of the formula: <IMAGE> x represents Cl, Br, F, SO3H or a quaternary ammonium group; R1 represents an optionally substituted C1-8-alkyl radical; R2 represents hydrogen or an optionally substituted C1-8-alkyl radical; and T represents a 1,3- or 1,4-phenylene radical which may carry one or more substituents selected from halogen, alkyl, alkoxy, acylamino, nitro and carboxy.

We claim: 
     
       1. A water-soluble reactive dye of the formula:   D--Z--NH--T--NR--Z--D     wherein   each D is a radical of a sulphonated water-soluble dye of the formula: ##STR12## wherein A is a sulphonated phenyl group or a sulphonated naphthyl group, one of U and V is SO 3  H and the other is H;   each Z is a triazinylene radical of the formula; ##STR13## wherein X is Cl   R is C 1-4  -alkyl; and   T is 1,4-phenylene or 1,4-phenylene substituted by halogen.   
     
     
       2. A water soluble reactive dye according to claim 1 in which A has a sulpho group in an ortho position relative to the azo group. 
     
     
       3. A water-soluble reactive dye according to claim 1 in which A is selected from: ##STR14## 
     
     
       4. A water soluble reactive dye according to claim 1 in which R is methyl. 
     
     
       5. A water-soluble reactive dye of the formula:   D--Z--NH--T--NR--Z--D     wherein   each D is a radical of a sulphonated water-soluble dye of the formula: ##STR15## wherein A is a sulphonated phenyl group or a sulphonated naphthyl group;   each Z is chlorotriazinylene;   R is C 1-4  -alkyl; and   T is 1,4-phenylene.   
     
     
       6. The water-soluble reactive dye of the formula: ##STR16##